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Sindrei [870]
3 years ago
11

Work Out The Value of X

Mathematics
1 answer:
melomori [17]3 years ago
8 0

Answer:

71°

Step-by-step explanation:

3x° + (x - 11)° + (2x - 55)° = 360°

3x + x - 11 + 2x - 55 = 360°

6x - 66 = 360°

6x = 360° + 66°

6x = 426°

x = 71°

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A store buys items at a wholesale price of $45 each. If the store marks up the price, and no discounts are given, which could be
jeyben [28]

Answer:

49 and 65

Step-by-step explanation:

when a price is marked up it is greater than the original

7 0
3 years ago
Read 2 more answers
Solve.<br><br> -15 = -0.2k<br><br> k =
Stels [109]
-0.2k = -15 ( then divide -0.2k on both sides)

The answer is then k= 75
3 0
3 years ago
I NEED HELP PLEASE 10 POINTS
densk [106]

Answer:

Yes, it is proportional because it has a constant rate of change. I think so at least.

Step-by-step explanation:

Every day she loses $5.

6 0
3 years ago
Type the correct answer in the box. Rewrite the quadratic equation in the form y = a(x − h)2 + k. y=5x^2-30x+95
S_A_V [24]

Answer:

y = 5(x - 3)^2 + 50

Step-by-step explanation:

The problem wants you to rewrite the quadratic equation in the vertex form y = a(x - h)^2 + k

You are given a quadratic equation in standard form (ax^2 + bx = c).

To convert from standard form to vertex form, there are two ways but I will show you the easier(?) way.

Use the formula x = -b/2a to find the x-value (h) of the vertex. Note that the vertex in "vertex form" is (h, k) which is virtually the same as (x, y).

In y = 5x^2 - 30x + 95, a = 5, b = -30, and c = 95. Substitute a and b into the formula -b/2a.

  • -(-30) / 2(5)

Two negative make a positive, so -(-30) becomes 30 and 2 times 5 is 10. Now we have:

  • 30/10 which simplifies down to 3.

The x (h) value of the vertex is 3. To find the y-value, substitute 3 into the original standard form equation.

  • y = 5(3)^2 - 30(3) + 95
  • = 5(9) - (90) + 95
  • 45 - 90 + 95
  • 50

The y (k) value of the vertex is 50. Now we have: (h, k) ⇒ (3, 50).

Substitute the values for h and k into the vertex form.

  • y = a(x - 3)^2 + 50

We still need the a-value, and this is easy to find. You take the a value from the original standard for equation (remember: <u>a</u>x^2 + bx + c)

So our a-value is 5. Now we can substitute this value into the vertex form and complete the question.

y = 5(x - 3)^2 + 50

6 0
3 years ago
The perimeter of square ground is 122
Hatshy [7]

Answer:

i. 30.5m

ii. 930.25m²

iii. Rs. ‭37,218‬

Step-by-step explanation:

Perimeter of a square = 4 * Length

i. Length = Perimeter/4

= 122/4

= 30.5 m

ii. Area = Length * Height

= 30.5 * 30.5

= 930.25 m²

iii. Cost of growing grasses at Rs. 40 per m²

= 930.25 * 40

= Rs. ‭37,218‬

5 0
3 years ago
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